Lathe-feed mechanism.



J. R. PERRINE. LATHE FEED MEGHANISM. APPLIOATION FILED JUNE 11, 1908.

Witnesses:

J. R. PERRINE.

LATHE FEED MEGHANISM. APPLICATION FILED JUNE 11, 1908.

IIII

` LDUIHIDIIIKIIHM( )l DI .Patented Feb. 16, 1909.

4 SHEETS-SHEET 2..

WM 2.63m

Inventor @Wtwef Attorney J.- R. PBRRINB.

LATHE FEED Mlacmfxmsla.v APPLICATION FILED JUNE ll, 1908 4 SHEETS-SHEET 3.

Wtnes'ses: inventor 'zr'y ogl, m. 5. @dde/w.

Attorney Patented Feb. 16, 1909.

J. R. PERRINE.. LATHE FEED MEOHANISM. APPLIUATION FILED JUNE 11, 190s.

9i 2,609, Patented Feb. 16, 1909.

4 SHEETS-SHEET 4.

Attorney UNITED STATES PATENT OFFICE..

JOHN R. PERRINE, OF CINCINNATI, OHIO, ASSIGNOR TO THE L'INL'INNATI LATHE @t TOOL COMPANY, OF CINCINNATI, OHIO.

LTHE-FEED MECHANISM.

Specification of Letters Patent.

Patented Feb. 16, 1909.

Application filed .Tune 11, 1908. i Serial No. 437,833.

. Will be readily understood from the following description taken in connection with the accompanying drawings in Whichz- Figure 1 is an end elevation of a lathe having feed mechanism embodyin an eX- emplification of inyfpresent invention: Fig.

'2 a front elevation of a portion of the Same,

part-s appearing in vertical section in the plane of line a of Fig. l: Fig. 3 a plan of the improved feed mechanism detached from the 'general lathe structure: Fig. t a view similar to Fig. 3 but With a portion of the lead-screw omitted, and the cover` of the gear box being removed: Fig. 5 a vertical transverse section of the mechanism in the plane i' of line b of Figs. .2, 3 and et: Fig. 6 a diagrammatic view of the mechanism: Fig. 7

a plan of the speed-changing lever: and Fig.

H a. side view of a portion of this lever. A

In the drawings :#1, indicates the lathe bed: 2, the headstock: 3, the lathe arbor: Aet,

the gear-shaft journaled in the headstock to serve as a transmitting element between the arbor and the lead-screw, this gear-shaft being often termed the spindle 5, a gear fast on the outer portion of the spindle: 6;, a gear fast on the outer portionof the arbor: 7, the reversing tumbler: 8, the reversing pinions carried by the tumbler and adapted for cooperation between the gears 5 and 6: 9, the lead-screw: l0, the gear-seat on the outer end .'of the spindle 4 to receive A a change-gear 11, a gear-seat on the outer end of the lead-screw to similarly receive a change-gear: 12,'the so called quadrant to support an intermediate gear between the change-gear on the spindle and the changegear on the lead-screw: and 13, the feed rod.

All of the parts thus far referred to are,

or may be, as usual in ordinary engine lathev construction and subject to all of the suitable usual modifications in those details.

And the operation of the parts thus farrel,

ferred to is precisely as usual, that is to say,

suitable change-gears having been'put upon the spindle and upon the lead-screw to/cooperate through the inedium`of an intermediate gear carried by the quadrant, the l lathe arbor will transmit rotary motion to the lead-screw at a ratedependent upon the proportioning of the change-gearing selected. The direction ofinotion of the leadscrew relative to that of the arbor, Will depend upon the position of adjustment of the reversing tumbler, the lead-screw turning in one direction when a single one of the reversing pinions 8 is in action, as in Fig. l,

-and in the other direction when the reversing tumbler is so adjusted as to bring both ofthe reversing pinions into active service in the transmission train. The lead-screw is to act on the lathe carriage in the usual manner, and so also is the feed rod 13.

The present invention has to do with the manner of driving the feed rod at selective rates of speed.

Proceeding with the drawings 1-Lt, indicates a gear yfast on the feed iod in the neighborhood ofthe headstocli: l5, a second gear fast on the feed rod near gear le, but of different size: and 1G, a pinion splined onthe lead-screw and adapted to be adjusted into and out of mesh with gear l-t.

.its thus` far described it. will be manifest that with the leadfscreiv turning at any 'given rate the'feed rod may be at rest or,

by Sliding the gear 1G into engagement with gear lat, the feed rod may be turned at a rate, relative to that of the lead-screw dependent on the relative proportion of gears liland 14:. Then the f'eed rod is thus driven through the lead-screw its rate of turning, relative to that of the arbor, Will be dependent upon the change-gears selected for use'on the spindle and the lead-screw, and the direction of the turning will be dependent upon the adjustment of the reversing tumbler. A- range of selective s eeds for the feed rod, when the feed ro is thus driven through the inedi-um A'of vthe lead: screw, is limited onl-yby the numberbof change-gears at command. ,This changing of speed rates for vthe feed rod by changing the'cliange-gears is not convenient and it is desirable to have at instant command a reasonable number of speeds for the feed-rod.

Proceeding with the dravvings:-l7, indicates a eountershaft mounted parallel with the head end of the lead-screw and feed rod: 18, a plurality of unii'ied diversely sized worm gears splined on this countershaft, the

- ing bolt, the

. outerend of the lever toV servein rockingthe lever atright an les with spindle 4 and with v of the gear casing to serve as a guide for Igroove 35i in such manner .that the sliding bolt `will be out from under the lever andthe l tion on spindle 4, this lever to lhave its inner end take positionunder worm gears being inclosed within and the I countershaft journaled in a suitable casing secured to the lathe bed: 19,I a shifter-fork I engaging one of the worm wheels and. adapted toslide the roup of worm wheels as a unit along on t e countershaft: 20, a retaining screw to hold the shifter-fork in' adjusted position: 21, a bevel gear f ast on spindle 4: 22, the casing in which 1s con-l tained the worm gears and in ywhich is journaled the countershaft: 23, the cover of the casing: 24, a lever mounted for rocking moassing through the casing and through a slbt in the outer wall thereof: 25, a detent handle on the lever and in detaining it in adjusted position, the detent handle having a pin to cooperate with detent holes in the outer wall of the casing: 26, a shaft journaled in the its axis intersecting that of the spindle: 27, a bevel pinion on the innerl end of lever shaft 26 and engaging-bevel gear 21: 28, al worm fast on the outer portion of the levershaft and adapted to enga e with such one ofthe worm gears as may brought below it: 29, a flange carried by the lever, below the worm, and having a mortise adaptedv to freely "engage over the upper portion of such one of the worm gears as-may at the time be under the worm: 30, a slot in the `cover 23 the shifter-fork 19, the dete'nt-screw 20 passing-,through this slot and into the 'shifterfork: 3l, counterbores in the upper surface of the cover at the slo't therein, these counterbores` receiving a shoulder on detent -screw 20 and serving to osi'tion the shifter-fork, there being one of) these counterbores for ea'h of the Worm gears and so positioned, respectively, that when the -detent screw engages one of the counterbores one of the worm gears will be in proper position below the worm: 32, a gear splined on the countershaft` 17 and adapted to mesh with gear 15 on the feed rod: 33, a gear vfast with gear 32 and adapted to mesh with gear 14 on the feed rod: 34, a long pin slidingthrough the inner wall of the gearcasing and adapted lever 24 and prevent that lever from descending far enough to bring its worm intoy engagement with any one of the ywormwhees: 35, a circumferential groove in the hub'of gear 16 which slides on the leadscrew: and 36, a lug carried by the outer end' 4of locking pin 34 and engaging in gear 16 brin s about the sliding of theloJclrength of the locking bolt being such that"when gear 16 is out'of-engagement with gear 14, as seen in Fig. 6, the locking lever is free to\ beI operated.

turned at certain speed.` If the double gears be shifted to the right then gears 32 and 15 can be brought into action and the feed rod will be driven at still higher speed. `With the countershaft 17 turnin at a given rate the adjustment ofthe don permits of alselection of either of two speeds for the feed-rod. If the intermediate wormgear be brought into action under the worm then a lower speed is given tothe countershaft, and a still lower speed is given to it if the 'largest worm-gear be brought into action. In the example given with three worm gears, ,the adjustment rofthe grou of worm gears provides for three chan es o speed for the countershaft, and the adjustment ofthe double gears 32-33 permits of the selection of two rates of transmission between the countershaft and the feed-rod, convenient and quickly operated provision thus being changesof speed for the feed-rod. The six rates of speed for the feed-rod are derived from the spindle 4 through the bevel gearing 21-27 and the` direction of motion of the feed-rod is dependent on the adjustment of the reversing tumbler,and the lead screw is in no wise involved in the transmission train. The driving of the feed-rod through the medium of theK `lead-screw,and the `practically unlimited ran e of speeds thereby available has been ya ready ex lained.y It will not answerto have the fee -rod geared to the lead-screw and also to the countershaft at the same time while the lead-screw and the countershaft are Vin motion, and a safety device is provided to take care of this'matter. In Fig. 6, when thelever is down to position corresponding with the engagement Vof the worm with any one of the worm gears, then the countershaft is in motion and the yfeed-rod may be driven by means of it. At such time gear 16 on the lead-screw must not engage gear 14 on the feed-rod and locking' pin 34 prevents such engagement byreason of the fact that the linner end of the locking pin would come in contact lwith the side of the lever and prevent gear 16 from sliding linto engagement with gear 1.4. If it be desired to drive theffeed-rod from the leadlifted so that the lockingbolt will pass below it, and this lifting ofthe lever puts it in such le gears 32-33i I`nade for the selection of any one` of six screw then :he lever must be' releasedand high position that its worm cannot engage with any worm gear, a condition -under which the countershaft is at rest and nothing harmful can happen if the countershaft be put into gear with 'the feed-rod. And when the lever has been lifted r so asV to permit the locking pin to pass under it and to permit ,gear 16 to engage gear v. 14, thus gearing the cad-screw to the feed-rod, the countershaft cannot be put into motion from the worm until gears l-lfl-are again disengaged so as to Withdraw the locking pin from under the lever.

vMakers and users of engine lathes understand that when a lathe' is provided with a lead-screwv and with a feedfrod the leadscrew may be reserved for screw cutting only and the feed-rod may be employed for all general feeding purposes. r, if desired, the lead screw may alsobe employed for feeding purposes, and 'the lead-screw may, and is employed for feeding purposes, on lathes not having a feed-rod. In the present case the mechanism controlled by the lever is for turning the feed-rod but it is'manifestthat if the feed-rod, instead of being a mere splinedl rod, were in fact itself a screw, the transmitting mechanism controlled by the lever would oerthe same facilities for the adjustment of the, speedv of that screw. In

otherwords, the feed-rod might bea screw,

and incontemplation of the possibility of it being either a splined rod or a screw I will, in the claims, apply to it the term feed- `shaft 'as com rehending either a screw shaft or a splined s aft.

l. Lathe feed' mechanism comprising, a lathe arbor, a spindle turned thereby, a bevelgear on the spindle, a. lever rocking on the spindle, a detent for the lever, a shaft joui" naled in the lever` at right angles to the spindle, a bevel-gear fa-st on the shaft and engaging the bevel-gear on the spindle, a worm' on the shaft-a feed-shaft, a counter` shaft, gearin connectin the feedfshaft and the counters aft, a pIurality of unified worm-gears splinedjon the countershaft and adapted for alternative engagementl with the worm, mechanism for shifting the Wormgears on the countershaft and for securing them in such position that either of the worm gears may be engaged by the worm,- and a device carried byf the lever and adapted to engage such worm wheel as may be in action and prevent endwise displacement of the Worm-gear relative to the lever, combined substantially as set forth.

Q.'Lathe feed mechanism lcomprising, a lathe arbor, o a spindle turned thereby, a bevel-gear on the-spindle, a lever rockin on the spindle, a detent for thevlever, a s 'aft journaled in the lever at right angles to the spindle, a bevel-gear fast onthe `shaft and engaging the bevel-gear on the spindle, a

. Worm on the shaft, a feed-shaft, a countershaft, gearing connecting the feed-sha ft and the countershaft, a plurality of unified wormgears splined on the countershaft and adapt` ed for alternative engagement with the worm, mechanism for shifting the wornrgears on the counter-shaftand for securing them in such position that either of the worin gears may be engaged bv the worm, and a mortised flange carried by the'lever and adapted* to engage the selected wormear .sidewise and prevent the Worm-gear rom shifting endwise 'relative t0 the lever, combined substa-ntiall'y as set forth.

3. Lathe feed mechanism comprising, a lathe arbor, a spindle turned thereby, a bevel-gear on the spindle, a lever rocking on .the spindle, a detent for the lever, a shaft journaled in the lever at right angles to the spindle, a bevel-gear fast on the shaft and engaging the bevel-gear on the spindle, a worm on the shaft., a feed-shaft, a countershaft, gearing connecting the feed-shaft and the countershaft, a'plurality of unified Worm` gears on the countershaft and adapted for alternative enga ement with the worm, a Xed casing inc o'sing the worm-gears, a shifter-fork enga-ging oneof the worm-gears and having sli ing engagement in a part of the casing, and a screw for; bindino` the shifter-fork in adjusted position, conibined substantially as setV` forth.

4. Lathe feed mechanism comprising, a lead-screw, a lathe arbor, a spindle turned thereby,l a bevel-gear on' the spindle, a lever rocking on the spindle, a detent for the lever, a shaft journaled in the lever at right angles to the spindle, a bevel-gear fast on the shaft and engaging the bevel-gear on the spindle, a worm on the shaft, a feedshaft, a countershaft, gearing connecting the feed-shaft and the countershaft, a plurality of unified worm-gears splined on the counter-shaft and adapted for alternativeengagementywith the worm, mechanism for shift-ing the worm-gears on the countershaft and for securing them in such position that either of the worm-gears may be engaged by the worm, a sliding gear mounted on the lead-screw and adapted to engage a gear on the feed-shaft, and a sliding locking pin operated by said sliding gear and adapted to engage said lever and prevent the engagement of said. sliding gear if the worm is in engagement with one of the worm-gears and to take position under the lever and prevent the engagement ofthe worm with a wormgear if the sliding gear on the lead-screw is in action, combined substantially as set forth. y

5( Lathe feed `mechanisni comprising, a lathe arbor, a spindle turned thereby.,- a bevelsgear on the spindle, a lever rocking-oli the spindle, a detent for the lever, a shaft journaled in the lever at right angles to the spindle, a bevel-gear fast on the shaft and gears splined on the eountershaft and adapt` ed for alternative engagement with the Worm, mechanism for shifting the Worm.

gears 011 the counter-shaft and for securing them in such position that either of the wormgears may be engaged by the Worin, a leadscrew, change-gear receiving features on the spindle and lead-screw, and disengageable gearing `connecting the lead-screw and feedshaft, combined substantially as set forth.

6. Lathe feed mechanism comprising, va casing, a shaft j ournaled therein, a plurality ,of gears splinedon the shaft Within-the casing, a casing-part provided with a slot parallel with said shaft and having a series of oounterbores forming depressions in said casing-part at each side of the slot, a shifter` fork engaging one of said gears and having a part fittedto slide in the slot opposite the counter-bored surface thereof,- and a detent screw passing through sai slot yand, into said shifter-forkI and having a portion adapt- 'ed to enter any selected one of said counter` hores, whereby said deten't screw serves to position the shifter-fork and ears longitudinally and then clamp the shi ter-fork firmly to the casing-part, combined substantially as set forth.

JOHN R. PERRINE. Witnesses:

F. MCCALL, W. C. HEINnEL. 

